Overshot fishing-tool



E. A. KLIEWER.

OVERSHOT FISHING TOOL.

APPLICAI'ION [ILED mu' 11.1919.

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UNITED STATES PATENT OFFICE.

EDWARD A. KLIEWER, OF POLAR. TEXAS.

OVERSHOT FISI IING-TOOL Application filed July 17, 1919.

To r/Z/ II/20m it lllllf/ won/om Be it known that T. Enwwiai KLIFAVJZR. a citizen of the United States. residing at 'lolar. in the eounty of .llood and State of Texas, have invented (-ertain new and useful Improvements in ()vershot Fishing Tool and i do dei-lare the Following to no a full. elear. and exaet deseription ol' the invention. sur'h as will enahle others skilled in the art to whieh it appertains to make and use the same.

The invention relalrs to an overrhol lilwhing; tooh and more spei-ilirallv to an inn proved tool for removing: hits. llllllll'ltillliitln s. hottoms of hailers, reameuhowls and other articles from hored or drilled wells.

()ne object of this invention is to provide an improved device of this ehararter that is extremely convenient and eliieient in re moving tools. parts of tools and other artioles from wells. and whieh ran he niauu faetured at a comparatively low eost.

other objects and ad ant-ages may hecome apparent to persons who read the following details and deseriptions in onneo tion with the aecom 'iai'iying drawings in which: 1

Figure 1 is a view partly in vertieal seetion. the main elements of the invention heing shown in elevation.

Fig. 2 is an enlarged central vertieal sew tional "iew illustrating the main elements of my invention in connection with a well having a casing therein and having a tool resting in the usual position after being diseonneeted from the raising and lowering means.

Fig. 3 is a view somewhat similar to Fig. '1. but the main elements of the invention heing shown in their ope 'ating o'r tool-engaging position.

Fig. 14; is a horizontal or lateral sectional view. the sertion heinp taken along the line 44 of Fig. 2.

Fig. 5 is a horizontal sectional view. the section being: taken along the line :1-5 of Fig. 2.

Fig. (5 is a 't'ragi'nental detail view illustrating a modified form of one of the jaws or clamping members.

Referring to these drawings in detail. in which similar referenre eharaeters correspend several views. and in which the well-easing 7 and tool 8 are of ordinary construction;-

Specification of Letters Patent.

with similar parts throughout the.

Patented Apr. 0, 1920.

Serial No. 311,423.

. The main elements of the invention romprise a plurality of jaws 9 which are rated at 10. these serrations heing formed on the working, faces of the jaws and heing engageahle with the tool 8 or will) other artioles to he raised from the well. llaeh oi the jaws also rolnprises l longitudinal series of teeth 11 on the surlare opposite to or outwardly from the working surface. The upper end of eai'h jaw or united with or ulfai-lialdrlo a supporting head 12. srr ws 11' living preferably em ployed as the attaehing' means.

A hell-shaped or hollow ('uliii'dl element l t ineloses the head 12 and the upper ends of the jaws 9. In tart. the major portion of the jaws is normally ini-losed h the hellshaped element. and means is provided for yieldingly supporting the jaws within the liell'shaped element as follows: The upper end of the hell-shaped element 1-1 is united with a tubular element 15. and these two elements 14 and 15 may he. formed integrally. as shown. so they eonstitute a unitary member. The upper end of the ele ment 15 is preferably screw-threaded so as to (:onneet with element 16 of the ordinary raising and lowering means. A rod 1? has its lower end Secured to the head 12. and extends upward through the central opening of the tubular element 15 and thenee through a helical spring 18 and through a washer 19 which rests upon the upper end of the spring. A head. or nut on the upper end of the rod 17 cooperates with the rod. spring. element 15. head 12 and helhshaped element 14 for closing the jaws toward one another. In other words, the spring 18. rod 17 and head 12 mutually cooperate to draw the jaws within the hell-shaped element 1-1, and in doing so. the lower or out wardlv diverging ends oi the jaws are pressed inward hy the lower end of the bellshaped element. thereby eausing; the jaws to close upon any article whieh has been inserted between the jaws.

From the foregoing description. it will be seen that when a; eoniparatively light article, has been clamped or gripped by the jaws such article may he supported by the sprinp 18 While the device is being raised from the Well; but where the article to be raised is so heavy as to overcome. the ten sion of the spring 18. the following auxiliary or supplemental means are provided in can har is nection with the serrations 11: A spring 20 is rovided for each jaw 9, each of these springs having one end secured to the bells aped element at 21, and this element is apertured at 22 to permit the passage of teeth 23. There may be one or more of the teeth 23 upon each spring 20, and each spring together with its tooth or teeth con stitutes a detent which is interchangeably engageable with the teeth 11 of the adjacent jaw Therefore, as the jaws 9 move long1- tudinally in the bell-shaped element, the teeth 23 ride over the teeth 11, and when it is desired to lock the teeth 23 in engagement with the teeth 11, a kee er 24 may be lowered so as to surround tie springs 20 and hold the teeth 23 in engagement with the teeth 11. It will be seen, therefore, that the teeth 23 and 11 cooperate with one another and with the spring 18 for holding the jaws at any adjusted position with rolatimi to the bell-shaped element 14.

Although the jaws 9 may be sufiiciently elastic to efl'ect their movement to their most extended osition and permit them 1o be closed 'suflibiently to grip a comparatively small article, springs 25 may be provided for opening the jaws with relation to one another, or for supplementing the inherent sprin action of the jaws.

Re erring again to the keeper 24, this member is formed with a slot 26 which is sufficiently wide to permit it to be passed laterally around a cable 27 or rod 28 of the raising and lowering means, and therefore it is unnecessary to cut or disconnect the raisin and lowering means or string oi. tools t dr the purpose of attaching this keeper. The keeper may be provided with an up wardly extending arm 29 having a rope or cable 30 connected to its upper end for lowering and raising it.

It is well known that well drilling and operating tools are usually provided with a square or flattened portion such as indicated at B in Fi 2, and that a shoulder 8 is formed at t e u per end of such flattened" ortion. There ore, in the eventthat the jaws 9, or the jaws 9' such as shown in Fig. 6, fail to sufiiciently engage the tool 8 with their serrations 10, the shoulder or shoulders 8 may be en aged by a Iplurality of s rings or overshot fiiigers 9". tech of these ngers has its lower end secured to or integral with one of the jaws 9, and the upper end portion of each fin er 29 diverges from the working face of t e jaw in the direction of the attaching end of the latter.

As intimated in the foregoing, the teeth 11 and 23 are not necessar when light articles are to be raised, and t erefore, such teeth may be dispensed with as shown in the modified form of the jaw illustrated in or the purpose of holding the jaws against rotation in the beltshapcd clement, so that the jaws may cooperate with the detents 20 when. necessary, the screws 13 have elongated heads which extend outward through slots 30 which are formed in they bell-shaped element 14-.

Apertures 31 are provided in the jaws S), and an appropriate form of tool may be engaget in the apertures 31 for pulling the jaws downward or outward with relation to the bell-shaped element 14, and a somewhat fragile member, such as a stick 32 may he placed between the head 12 and the lower end of the element 15 so as to hold the jaws in their extended position, as shown in Fig. 2.

In operating this device, it is first set by means of the stick 32, so that its jaws are in their most extended and wide open position; the fishing device is then lowered to the mouth of the well r casing, and the jaws are pressed inward sniiiricntly to prrmit them to enter the well or casing. linoutersurfaces of the jaws hare conrrxcd portions 33, the lower ends thereof are prevented from penetrating the sides of the Well and being stopped thereby while being lowered into the well; when the jaws 9 sur round the upper end of the article to be removed from the well, a downward pres sure or jar on the elen'ient 15 causes the stick to break, and the hell-shaped element 14 now presses downward against the converted. portions 33 so to cause the jaws to move inward into engagement with the article to be raised, and now upon raising the fishing tool, the tool or other article 8 is also raised, being securely gripped by the teeth 11 or en ga ed by the overshot lingers 9, or both.

...lthough I have described this embodiment of my invention very specifically it not intended to limit this invention to these exact details of construction and arran ements, but changes may be made within tie scope of the inventive ideas as implied. and claimed.

What I claim as my invention is:

1. In a fishing tool, a pluralit of jaws,

a supporting headto Wl'l1('-l1 sait jaws are secured, a tubular element .connectible with a raising and lowering means, a supporting and actuating spring supported by said tubular element, a rod extending into said tubular element and secured to said head and supported by said spring so that said jaws are ieldingly supported by said spring, ant means cooperative with said head, rod, tubular element, and spring for closing; said jaws.

2. n a fishing tool, a plurality of jaws each formed with a longitudinal series of teeth, elastically supported-means support ing said jaws and permitting the jaws to be moved up and down relative to said means,

and detents interchangeably engageabie with said teeth to hold said jaws in (litterent positions relative to said elastically sup ported means.

'3. In a fishing tool, a plurality of jaws each formed with a longitudinal series of teeth, elastically supported means supporting said jaws and permitting the jaws to he moved up and down relative to said means, detents interchangeably engage-able with said teeth to hold said jaws in different positions relative to said elastically supported means, and a keeper adapted to be moved. into and out of position for holding said detents in engagement with said teeth.

4. In a fishing tool, a plurality ofjaws, a head supporting said jaws, a supporting element to which said head is yieldingly connected and adapted to more up and down, setting means to hold said. head spaced from said supporting element during normal pressure on said setting means, said setting means being adapted to yield for permitting said head and supporting element to approach one another when ahnormal pressure is applied on said setting means, and means to operate said jaws when said head and supporting element approach one another.

5. In a fishing tool, a piurality of jaws, a head to which said jaws are connected, it

jawwontrolling member euvompassing the we and being eonnertihlo to at raising and lowering means, and means rouneeting said head to said jaw-eoutrolling member and heing eli eetive to more the free end portions at the jaws into the jaw-controlling memiier, said jaws being movable downward within a well easing and being movable horizontally until they h airagainst the wells side below the easing.

(i. In a fishing tool. a plurality of jaws eaeh formed with a longitudinal series of teeth, a jaw-supportinp head, svrews having elongated heads and being etl'eetive to hold said jaws in engagement with said jawsupporting, head, a hell-shaped element havin g slots therein. and springs supported by the hell-shaped element and (ill'll provided with a tooth to engage with said teeth of one of said jaws, said head hiring movably mounted in said hellshaped element and adapted tn mow the tree end portions of the jaws in and out oi lwllsha a-d element, said screw heads being: slidahhin said slots and therehy roar-tin; with said lu'llshaped element to hold the teeth ot said jaws in registry with the teeth of said springs.

In testimony whereof l have hereunto set my hand.

Elbwiilll A. Klill lwl llt.

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